
<split-panels id="xxx" class="fluent-splitter" direction="row" barsize="8" blazor:onsplittercollapsed="1" blazor:onsplitterresized="2">
  <div slot="1">
    <b>render me</b>
  </div>
  <div slot="2">
    <b>render me</b>
  </div>
</split-panels>